src/paypal/views.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from decimal import Decimal
   6
   7 from django.contrib.auth.decorators import login_required
   8 from django.http import Http404
   9 from django.http.response import HttpResponseRedirect, HttpResponseForbidden
  10 from django.shortcuts import render
  11
  12 from api.piston_patch import HttpResponseAppRedirect
  13 from paypal.forms import PaypalSubscriptionForm
  14 from paypal.rest import execute_agreement, check_agreement, agreement_approval_url, PaypalError
  15 from paypal.models import BillingAgreement as BillingAgreementModel, BillingPlan
  16
  17
  18 def paypal_form(request, app=False):
  19     if request.POST:
  20         if not request.user.is_authenticated():
  21             return HttpResponseForbidden()
  22         form = PaypalSubscriptionForm(data=request.POST)
  23         if form.is_valid():
  24             amount = form.cleaned_data['amount']
  25             try:
  26                 approval_url = agreement_approval_url(amount, app=app)
  27             except PaypalError as e:
  28                 return render(request, 'paypal/error_page.html', {'error': e.message})
  29             return HttpResponseRedirect(approval_url)
  30     else:
  31         form = PaypalSubscriptionForm()
  32     return render(request, 'paypal/form.html', {'form': form})
  33
  34
  35 @login_required
  36 def paypal_return(request, app=False):
  37     token = request.GET.get('token')
  38     if not token:
  39         raise Http404
  40     if not BillingAgreementModel.objects.filter(token=token):
  41         resource = execute_agreement(token)
  42         if resource.id:
  43             amount = int(Decimal(resource.plan.payment_definitions[0].amount['value']))
  44             plan = BillingPlan.objects.get(amount=amount)
  45             active = check_agreement(resource.id)
  46             BillingAgreementModel.objects.create(
  47                 agreement_id=resource.id, user=request.user, plan=plan, active=active, token=token)
  48     else:
  49         resource = None
  50     if app:
  51         if getattr(resource, 'error'):
  52             return HttpResponseAppRedirect('wolnelekturyapp://paypal_error')
  53         else:
  54             return HttpResponseAppRedirect('wolnelekturyapp://paypal_return')
  55     else:
  56         return render(request, 'paypal/return.html', {'resource': resource})
  57
  58
  59 def paypal_cancel(request):
  60     return render(request, 'paypal/cancel.html', {})